tile.hpp

#ifndef TILE_HPP
#define TILE_HPP

#include <stdio.h>
#include <sqlite3.h>
#include <vector>
#include <atomic>
#include <map>
#include "mbtiles.hpp"
#include "serial.hpp"
#include "jsonpull/jsonpull.h"

enum attribute_op {
	op_sum,
	op_product,
	op_mean,
	op_concat,
	op_comma,
	op_max,
	op_min,
};

struct atomic_strategy {
	std::atomic<size_t> dropped_by_rate;
	std::atomic<size_t> dropped_by_gamma;
	std::atomic<size_t> dropped_as_needed;
	std::atomic<size_t> coalesced_as_needed;
	std::atomic<size_t> detail_reduced;
	std::atomic<size_t> tiny_polygons;

	atomic_strategy()
	    : dropped_by_rate(0),
	      dropped_by_gamma(0),
	      dropped_as_needed(0),
	      coalesced_as_needed(0),
	      detail_reduced(0),
	      tiny_polygons(0) {
	}
};

struct strategy {
	size_t dropped_by_rate = 0;
	size_t dropped_by_gamma = 0;
	size_t dropped_as_needed = 0;
	size_t coalesced_as_needed = 0;
	size_t detail_reduced = 0;
	size_t tile_size = 0;
	size_t feature_count = 0;
	size_t tiny_polygons = 0;

	strategy(const atomic_strategy &s, size_t ts, size_t fc) {
		dropped_by_rate = s.dropped_by_rate;
		dropped_by_gamma = s.dropped_by_gamma;
		dropped_as_needed = s.dropped_as_needed;
		coalesced_as_needed = s.coalesced_as_needed;
		detail_reduced = s.detail_reduced;
		tile_size = ts;
		feature_count = fc;
		tiny_polygons = s.tiny_polygons;
	}

	strategy() = default;
};

// long long write_tile(char **geom, char *stringpool, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int min_detail, int basezoom, sqlite3 *outdb, const char *outdir, double droprate, int buffer, const char *fname, FILE **geomfile, int file_minzoom, int file_maxzoom, double todo, char *geomstart, long long along, double gamma, int nlayers, std::atomic<strategy> *strategy);

int traverse_zooms(int *geomfd, off_t *geom_size, char *stringpool, std::atomic<unsigned> *midx, std::atomic<unsigned> *midy, int &maxzoom, int minzoom, sqlite3 *outdb, const char *outdir, int buffer, const char *fname, const char *tmpdir, double gamma, int full_detail, int low_detail, int min_detail, long long *pool_off, unsigned *initial_x, unsigned *initial_y, double simplification, double maxzoom_simplification, std::vector<std::map<std::string, layermap_entry> > &layermap, const char *prefilter, const char *postfilter, std::map<std::string, attribute_op> const *attribute_accum, struct json_object *filter, std::vector<strategy> &strategies, int iz, struct node *shared_nodes_map, size_t nodepos);

int manage_gap(unsigned long long index, unsigned long long *previndex, double scale, double gamma, double *gap);

#endif